L band multistage amplifier with improved noise figure
US6441953B1 · kind B1 · utility
7Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Apr 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06758
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-stage optical fiber amplifier comprises a first gain stage amplifying and optical signal; a pumping source coupled to the first gain stage, a second gain stage coupled to the first gain to further amplifying the optical signal to a desired output signal power, and a second pumping source coupled to the second gain stage. The second pumping source is preferably an erbium-doped fiber laser and has an operating wavelength between about 1520 nm and about 1620 nm. This amplifier achieves good noise figure and high output powers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.